diff --git a/cmd/setup_challenges.go b/cmd/setup_challenges.go
index 2ec38198..0a59099a 100644
--- a/cmd/setup_challenges.go
+++ b/cmd/setup_challenges.go
@@ -159,7 +159,7 @@ func setupDNS(ctx *cli.Context, client *lego.Client) error {
 
 func checkPropagationExclusiveOptions(ctx *cli.Context) error {
 	if ctx.IsSet(flgDNSDisableCP) {
-		log.Println("The flag '%s' is deprecated use '%s' instead.", flgDNSDisableCP, flgDNSPropagationDisableANS)
+		log.Printf("The flag '%s' is deprecated use '%s' instead.", flgDNSDisableCP, flgDNSPropagationDisableANS)
 	}
 
 	if (isSetBool(ctx, flgDNSDisableCP) || isSetBool(ctx, flgDNSPropagationDisableANS)) && ctx.IsSet(flgDNSPropagationWait) {